histogram! ( hashtable seq -- hashtable )
Statistics » Computing histograms

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Vocabulary
math.statistics

Inputs

hashtable	a hashtable
seq	a sequence

Outputs

hashtable

a hashtable

Word description
Takes an existing hashtable and uses histogram to continue counting the number of occurrences of each element.

Examples

! Count the number of times the elements of two sequences appear. USING: prettyprint math.statistics ; "aaabc" histogram "aaaaaabc" histogram! .
H{ { 97 9 } { 98 2 } { 99 2 } }

Definition

IN: math.statistics

: histogram! ( hashtable seq -- hashtable )
    [ ] histogram-by! ; inline